发电厂厂用电源切换技术研究  

Study of house supply transfer in power plant

作　　者：党杰[1] 刘涤尘[1] 叶念国[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2005年第6期89-91,共3页Electric Power Automation Equipment

摘　　要：分析了发电厂传统的厂用电切换方式,指出厂站备用电正常切换应是2个电源的同期操作,而事故切换是备用电源与仅靠惯性而无后续动力支持的电动机群的电气对接。进而对影响电动机群自启动的主要因素进行了分析,并对感应电动机静态电压特性及厂用电母线残压特性进行了研究,最后明确指出事故切换应综合考虑备用电源电压和厂用电母线残压的相量差及残压状况选择合适的时机。The traditional transfer methods of house supply in power plant are analyzed. It is pointedout that the normal transfer should be synchronized between two sources,while the emergency transfer is the electrical connection between the standby source and the motors,which run only by inertia without supporting power. The main factors affecting the self-startup of motors are analyzed. The static characteristics of induction motors and the phasor diagram of residual voltage on bus are studied. The phase difference between standby source voltage and bus residual voltage,together with the status of residual voltage,should be synthetically considered for the proper emergency transfer.

关 键 词：备用电源 快速快换 残差 感应电动机 

分 类 号：TM62[电气工程—电力系统及自动化]